Water-tube steam-generator.



L. E. CONNELLY.

WATER TUBE STEAM GENERATOR.

APPLICATION FILED FEB. 12. 1916.

1,201,442. Patented Oct. 17,1916.

2 SHEETS-SHEET 1- L. E. CONNELLY.

WATER TUBE STEAM GENERATOR. APPLICATION HLEDFEB.12.I9I6..

1,201,442. Patented 0ct.17,1916.

2 SHEETS-SHEET 2.

1 S PA LAWRENCE E. CONNELLY, 0F CLEVELAND, 01110..

WATER-TUBE STEAM-GENERATOR.

Specification of Letters Patent.

Patented 00am, 1916.

Application filed February 12, 1916. Serial No. 77,966.

and exact'description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, forming part of this specification.

My invention relates to' water-tube steam generators of the Sterlingtype, and has for its object to increase the effective distance betweenthe water level in the boiler and the steam outlet. This I accomplish bylocating the upper drums of the boiler at different elevations withrelation to each other, so that one of them will at all times beentirely filled with water, the next will be substantially half filledwith water, and'in which all the steam generated, will be liberated, andthe next will be substantially one-quarter full of water, and from whichthe steam liberated in the second, will be withdrawn for use.

The features of my invention will be explained and pointed outhereinafter. and are illustrated in the accompanying drawings, in which:

Figure 1, is an end view in elevation of a water-tube steam generatorwith the setting thereof in section. Fig. 2, is a like view of analternative construction embodying my invention.

In these drawings A, indicates a lower, or mud drum; B, indicates awater receiving drum; C, indicates a water and steam drum, wherein thesteam is liberated from the water; and D, indicates a steam receivingdrum, which receives steam from the drum C, as hereinafter described; D,indicates a feed water' supply pipe, through which preheated feed wateris supplied to the drum D, from any suitable source, (not shown). Themud drum A, communicates with the drum C,-by means of up-fiow watertubes E and E, preferably through the drum B, which serves as aheader-to eflect communication between the two series of tubes E and E,and, the drums C and A, communicate by means of down-flow water tubes F,

which conduct the water in the drum C, which hasnot been converted intosteam, back to the mud drum A.

G, lndicates a series of steam conveying tubesthrough which steamwhichhas been liberated in the drum C, flows into the drum D, from which itflows through the connect1on d, to its point of use. The drum D,communicates with the drum A, by means of a series of down-flow watertubes H,'

which conduct the feed water from the drum D,-to.the drum A. v

J, indicates a blow-ofi' pipe, and J, indicates a shut-off valvetherein.- Above the series of ,up-flow tubes E, I place a baflie-' k,which compels the fire gas to travel upward along the tubes E and E, andover against the tubes F. Above the tubes E, I place a baffle-wall L,which in the construc tion shown in Fig. 1, extends from the drum B, tothe drum C, and operates to pre vent the fire gas from flowing above thetubes E. Above the tubes F, I place a baflie-wall M, which does notextend entirely to the drums A, and C, the upper end thereof extendingupwardly between the drums C and D.

From the upper portions of the baflle-wall M, a baflie-wall M, extendsto the drum D, having a contracted opening m, therein through which asmall portion of the fire gas may flow. The wall M, is also providedwith a lateral extension m, to cause the fire gas passing around itslower end to flow toward the tubes H.

N, indicates the rear wall of the boiler setting from which shortbaffle-walls n n, extend to throw the fire gas toward the tubes H,during their upward passage to the smoke exit N.

0, indicates the front wall-of the boiler setting which is provided.with a deflecting wall 0, to cause the fire gas to be deflectedtowardthe tubes E.

P, indicates the fire wall in front of the mud drum A;'and P, indicatesthe furna e grates.

R, indicates the top of the b01161 settin which extends from the frontwall 0, to the rear wall N, covering the drums C and D,

there are two generators like that shown in w-m; heat flows upwardlyfrom the furnace and around the ends of the bafile-walls as indicated bythe curved arrows and out through the smoke exit N a small portion ofthe fire gas flows over the upper end of the baflle-wall M, into thechamber under the cover R, between the drums C and D, whence it isdrawn-through the contracted openingm, in the wall M,-so that the tubesG, in the upper part of said chamber are subject to. heat as if in anoven, while the main portion of the volume of fire gas passes around thelower end of thebafile-wall M, and upward along the tubes H. As thewater in the tubes E, is heated, it flows upward through the drum B, andtubes E, into the drum 0, where such portion as has become steam isliberated and'fiows throu h the tubes G, into the vdrum D, while t eresidue of the Water in the drum C, flows downward in the tubes F, tothe drum A, to again flow through the tubes E, as before with anaddition thereto of sufficient fresh water from the drum D, (which iskept supplied by means of the feed-water 'pipe D) through the tubes H,which during its downflow throughthe tubes H, has become heated to thetemperature equal to that which flows downward in the tubes F,;' forWhile the fire gas which contacts with the tubes H, has been lowered intemperature somewhat, the flow of water through said tubes is slowerthan in the tubes E and'F.

The water in the tubes. E and .E, travels very rapidly, and on enteringthe liberating drum 0, from the tubes E, its force greatly agitates thewater in the drum C, which, when the steam is withdrawn from the drum C,as in ordinary constructions, in

many instances travels with the steam into the super-heater, where,during the process.

of super-heating the steam, the water carried with the steam .istransformed into steam. By means of my mvention. hereinbefore described,the steam which hasbeen liberated in the drum C, is conveyed by thetubes G, through the hot chamber between the drums C and D, into thedrum D, wherein there is no turmoil in the water contained therein, andduring the traverseof" the steam through the tubes G, whatever waterenters the tubes Gr, along with the steam, is therein transformed intosteam; so that steam which may be discharged from the generator throughthe steam line connection 03, will be free from water, as there is nofoaming or agitation present in the drum D. It will be obvious that theliberated steam while passing through the tubes fi, will be subjectedtoa baking process, so that the drum D, will contain only dry-steam andthat the effective distance between the water level in the drum D, andthe steam outlet, will be sufficiently increased by my invention, '50that the dry steam which enters the drum D, from the tubes G, will notbe detrimentally aifected by the still water therein.

In Fig; 2, the How of water in the tubes E, E, F and H, is the same asin Fig. 1, while the fiow of steam through the tubes G, is also thesame. It will be observed that the flow of the fire gas and the flow ofwater in the tubes is in the same direction, except in-the case of thetubes H, wherein the water flows in a direction opposite to the How ofthe fire gas.

Having thus fully illustrated and described my invention so that thoseskilled in the art can utilize the same, I do not desire to be limitedto the exact arrangement of apparatus shown, as many changes therein canbe made, Without departing from the spirit of my invention, but

What I claim as newand desire, to secure by Letters Patent is:

Ina water-tube steam generator, a firewall, a furnace grate, a lowerWater drum behind said fire-wall, a water drum above the front end ofsaid furnace grate and below the water level, so as to be at all timesfilled with water, up-flow water tubes connecting said drums, a steamliberating drum vertically above the rear end of said furnace grate andpartially above the water level, up=flow water-tubes connecting the samewith the second mentioned drum, down-flow water tubes connecting saidsteam llberating drum and said lower drum, :1.

steam and feed-waterzreceiving drum behind said steam liberating drumand at a higher' level with relation thereto, a steamdischargepipe-connection on said steam and feed-water receiving drum, aseries of downfiow water tubes connecting said. last mentioned drum andsaid-lower drum, and a series of steam conveying tubes connecting saidsteam liberating drum and said steam and feed-Water receiving drumwhereby steam liberated in said liberating drum, will be conveyed intosaid steam and feed-water receiving drum before being discharged fromsaid generator. 7

In testimony whereof I afiix my signature.

LAWRENCE E. CONNELLY.

